92 citations · 416 across the 16 of their papers we have counts for
16 papers
Improving the continuum limit of gradient flow step scaling
Anqi Cheng, Anna Hasenfratz, Yuzhi Liu +2
We introduce a non-perturbative improvement for the renormalization group step scaling function based on the gradient flow running coupling, which may be applied to any lattice gau…
Finite size scaling of conformal theories in the presence of a near-marginal operator
Anqi Cheng, Anna Hasenfratz, Yuzhi Liu +2
The slowly evolving gauge coupling of gauge-fermion systems near the conformal window makes numerical investigations of these models challenging. We consider finite size scaling an…
Improved Lattice Renormalization Group Techniques
Gregory Petropoulos, Anqi Cheng, Anna Hasenfratz +1
We compute the bare step-scaling function for SU(3) lattice gauge theory with massless fundamental fermions, using the non-perturbative Wilson-flow-optimized Monte…
Determining the mass anomalous dimension through the eigenmodes of Dirac operator
Anqi Cheng, Anna Hasenfratz, Gregory Petropoulos +1
We define a scale-dependent effective mass anomalous dimension from the scaling of the mode number of the massless Dirac operator, which connects the perturbative of an asymp…
Finite size scaling and the effect of the gauge coupling in 12 flavor systems
Anna Hasenfratz, Anqi Cheng, Gregory Petropoulos +1
Finite size scaling is a powerful tool to study the critical properties of systems governed by one relevant operator, assuming all irrelevant operators have scaling dimensions much…
Reaching the chiral limit in many flavor systems
Anna Hasenfratz, Anqi Cheng, Gregory Petropoulos +1
We present a brief overview of our recent lattice studies of SU(3) gauge theory with N_f = 8 and 12 fundamental fermions, including some new and yet-unpublished results. To explore…
Scale-dependent mass anomalous dimension from Dirac eigenmodes
Anqi Cheng, Anna Hasenfratz, Gregory Petropoulos +1
We investigate the eigenmodes of the massless Dirac operator to extract the scale-dependent fermion mass anomalous dimension gamma_m(mu). By combining simulations on multiple latti…
MCRG study of 8 and 12 fundamental flavors
Gregory Petropoulos, Anqi Cheng, Anna Hasenfratz +1
We study the renormalization group properties of SU(3) gauge theories with N_f=8 and 12 nearly-massless fermions, using Monte Carlo Renormalization Group (MCRG) two-lattice matchin…
Bulk and finite-temperature transitions in SU(3) gauge theories with many light fermions
David Schaich, Anqi Cheng, Anna Hasenfratz +1
We investigate finite-temperature transitions in SU(3) lattice gauge theories with Nf=8 and 12 staggered fermions in the fundamental representation. For both of these systems, we h…
Mass anomalous dimension from Dirac eigenmode scaling in conformal and confining systems
Anna Hasenfratz, Anqi Cheng, Gregory Petropoulos +1
The mode number of the Dirac operator scales with an exponent related to the mass anomalous dimension gamma_m. This relation holds both in IR-conformal systems, as well as in confi…
Novel phase in SU(3) lattice gauge theory with 12 light fermions
Anqi Cheng, Anna Hasenfratz, David Schaich
We study the phase structure of SU(3) lattice gauge theory with Nf=12 staggered fermions in the fundamental representation, for both zero and finite temperature at strong gauge cou…
Diagonal quantum Bianchi type IX models in N=1 supergravity
A. D. Y. Cheng, P. D. D'Eath
We take the general quantum constraints of N=1 supergravity in the special case of a Bianchi metric, with gravitino fields constant in the invariant basis. We construct the most ge…
Quantization of a Friedmann-Robertson-Walker model in N=1 Supergravity with Gauged Supermatter
A. D. Y. Cheng, P. D. D'Eath, P. R. L. V. Moniz
The theory of N = 1 supergravity with gauged supermatter is studied in the context of a k = + 1 Friedmann minisuperspace model. It is found by imposing the Lorentz and supersymmetr…
Quantization of a Locally Supersymmetric Friedmann Model with Supermatter
A. D. Y. Cheng, P. D. D'Eath, P. R. L. V. Moniz
The general theory of N = 1 supergravity with supermatter is studied using a canonical approach. The supersymmetry and gauge constraint generators are found. The framework is appli…
Quantization of Bianchi Models in N=1 Supergravity with a Cosmological Constant
A. D. Y. Cheng, P. D. D'Eath, P. R. L. V. Moniz
We study the quantization of some cosmological models within the theory of N=1 supergravity with a positive cosmological constant. We find, by imposing the supersymmetry and Lorent…
Quantization of the Bianchi type-IX model in supergravity with a cosmological constant
A. D. Y. Cheng, P. D. D'Eath, P. R. L. V. Moniz
Diagonal Bianchi type-IX models are studied in the quantum theory of supergravity with a cosmological constant. It is shown, by imposing the supersymmetry and Lorentz qua…